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fix: ram overflow in 2in66. (#18)

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susabolca
2024-07-17 22:29:35 +08:00
committed by GitHub
parent f0e3c62481
commit 5d4210f292
1 changed files with 26 additions and 6 deletions
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32
src/app/epd_2in66.c
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@@ -329,6 +329,28 @@ static void EPD_2IN9_BWR(int width, int height, int left, int top)
EPD_SSD_SendData(0x80); // 80: internal sensor 48: external sensor
}
void EPD_2IN9_FillRam(uint8_t value, int width, int height, int left, int top, uint8_t is_red)
{
// data size in bytes
int size = width*height/8;
// Set Ram X address
EPD_SSD_SendCommand(0x4E);
EPD_SSD_SendData(top & 0xff);
// Set Ram Y address
EPD_SSD_SendCommand(0x4F);
EPD_SSD_SendData(left & 0xff);
EPD_SSD_SendData(left >> 8);
const uint8_t reg = is_red ? 0x26 : 0x24; // BW: 0x24, Red: 0x26
EPD_SSD_SendCommand(reg);
for (int i = 0; i < size; i++) {
EPD_SSD_SendData(value);
}
}
void EPD_2IN9_WriteRam(uint8_t *image, int width, int height, int left, int top, uint8_t is_red)
{
// data size in bytes
@@ -377,8 +399,8 @@ void EPD_2IN9_Clear(void)
// clear
EPD_2IN9_BWR(EPD_WIDTH, EPD_HEIGHT, 0, 0);
EPD_2IN9_WriteRam(NULL, EPD_WIDTH, EPD_HEIGHT, 0, 0, 0);
EPD_2IN9_WriteRam(NULL, EPD_WIDTH, EPD_HEIGHT, 0, 0, 1);
EPD_2IN9_FillRam(0xff, EPD_WIDTH, EPD_HEIGHT, 0, 0, 0);
EPD_2IN9_FillRam(0x00, EPD_WIDTH, EPD_HEIGHT, 0, 0, 1);
// display
EPD_2IN9_Display(0xf7); // c7: by REG f7: by OTP b1: no display
@@ -541,11 +563,9 @@ void EPD_2IN9_Update_Image()
case EPD_CMD_FILL: { // write ram with color
uint8_t color = epd_step_data[0];
if (color == 1) { // red
memset(epd_buffer, 0xff, EPD_WIDTH*EPD_HEIGHT/8);
EPD_2IN9_WriteRam(epd_buffer, EPD_WIDTH, EPD_HEIGHT, 0, 0, 1);
EPD_2IN9_FillRam(0xff, EPD_WIDTH, EPD_HEIGHT, 0, 0, 1);
} else {
memset(epd_buffer, 0, EPD_WIDTH*EPD_HEIGHT/8);
EPD_2IN9_WriteRam(epd_buffer, EPD_WIDTH, EPD_HEIGHT, 0, 0, 0);
EPD_2IN9_FillRam(0, EPD_WIDTH, EPD_HEIGHT, 0, 0, 0);
}
break;
}